bss_null.c

/* crypto/bio/bss_null.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include <errno.h>#include "cryptlib.h"#include <openssl/bio.h>staticint null_write(BIO *h, constchar *buf, int num);
staticint null_read(BIO *h, char *buf, int size);
staticint null_puts(BIO *h, constchar *str);
staticint null_gets(BIO *h, char *str, int size);
staticlong null_ctrl(BIO *h, int cmd, long arg1, void *arg2);
staticint null_new(BIO *h);
staticint null_free(BIO *data);
static BIO_METHOD null_method=
{
BIO_TYPE_NULL,
"NULL",
null_write,
null_read,
null_puts,
null_gets,
null_ctrl,
null_new,
null_free,
NULL,
};
BIO_METHOD *BIO_s_null(void)
{
return(&null_method);
}
staticint null_new(BIO *bi)
{
bi->init=1;
bi->num=0;
bi->ptr=(NULL);
return(1);
}
staticint null_free(BIO *a)
{
if (a == NULL) return(0);
return(1);
}
staticint null_read(BIO *b, char *out, int outl)
{
return(0);
}
staticint null_write(BIO *b, constchar *in, int inl)
{
return(inl);
}
staticlong null_ctrl(BIO *b, int cmd, long num, void *ptr)
{
long ret=1;
switch (cmd)
{
case BIO_CTRL_RESET:
case BIO_CTRL_EOF:
case BIO_CTRL_SET:
case BIO_CTRL_SET_CLOSE:
case BIO_CTRL_FLUSH:
case BIO_CTRL_DUP:
ret=1;
break;
case BIO_CTRL_GET_CLOSE:
case BIO_CTRL_INFO:
case BIO_CTRL_GET:
case BIO_CTRL_PENDING:
case BIO_CTRL_WPENDING:
default:
ret=0;
break;
}
return(ret);
}
staticint null_gets(BIO *bp, char *buf, int size)
{
return(0);
}
staticint null_puts(BIO *bp, constchar *str)
{
if (str == NULL) return(0);
return(strlen(str));
}